The Void Emissary are the peace keeping force of the Twelve Worlds. Some of them belong to the Order of Hunters, those charged with assassinations. Pieter Strahd is one of them and he is given a mission to kill someone or the Twelve Worlds will sink into chaos. Soon he is joined by Kyp, a young æthernaut and Sarena Corr, with a living tree ship as transport. All of the together struggle against a mysterious force that could swallow all of the Twelve Worlds.